In a School science class four worms were placed into four separate jars.
The first worm was put into a jar of alcohol.
The second worm was put into a jar of cigar smoke.
The third worm was put into a jar of sperm.
The fourth worm was put into a jar of soil.
After one day, these were the results:
The first worm in alcohol --- dead.
The second worm in cigar smoke --- dead.
The third worm in sperm --- dead.
The fourth worm in soil --- alive.
So the science teacher asked the class --- "What can you learn from this experiment."
Little Johnny quickly raised his hand and said. "As long as you drink, smoke and have sex, you won't have worms."
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:-)